RetroZilla/modules/plugin/samples/npthread/windows/plugload.cpp

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2015-10-21 05:03:22 +02:00
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is mozilla.org code.
*
* The Initial Developer of the Original Code is
* Netscape Communications Corporation.
* Portions created by the Initial Developer are Copyright (C) 1998
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
*
* Alternatively, the contents of this file may be used under the terms of
* either the GNU General Public License Version 2 or later (the "GPL"), or
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
#include "windows.h"
DWORD GetPluginsDir(char * path, DWORD maxsize)
{
if(!path)
return 0;
path[0] = '\0';
DWORD res = GetModuleFileName(NULL, path, maxsize);
if(res == 0)
return 0;
if(path[strlen(path) - 1] == '\\')
path[lstrlen(path) - 1] = '\0';
char *p = strrchr(path, '\\');
if(p)
*p = '\0';
strcat(path, "\\plugins");
res = strlen(path);
return res;
}
HINSTANCE LoadRealPlugin(char * mimetype)
{
if(!mimetype || !strlen(mimetype))
return NULL;
BOOL bDone = FALSE;
WIN32_FIND_DATA ffdataStruct;
char szPath[_MAX_PATH];
char szFileName[_MAX_PATH];
GetPluginsDir(szPath, _MAX_PATH);
strcpy(szFileName, szPath);
strcat(szFileName, "\\00*");
HANDLE handle = FindFirstFile(szFileName, &ffdataStruct);
if(handle == INVALID_HANDLE_VALUE) {
FindClose(handle);
return NULL;
}
DWORD versize = 0L;
DWORD zero = 0L;
char * verbuf = NULL;
do {
strcpy(szFileName, szPath);
strcat(szFileName, "\\");
strcat(szFileName, ffdataStruct.cFileName);
if(!(ffdataStruct. dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY)) {
versize = GetFileVersionInfoSize(szFileName, &zero);
if (versize > 0)
verbuf = new char[versize];
else
continue;
if(!verbuf)
continue;
GetFileVersionInfo(szFileName, NULL, versize, verbuf);
char *mimetypes = NULL;
UINT len = 0;
if(!VerQueryValue(verbuf, "\\StringFileInfo\\040904E4\\MIMEType", (void **)&mimetypes, &len)
|| !mimetypes || !len) {
delete [] verbuf;
continue;
}
// browse through a string of mimetypes
mimetypes[len] = '\0';
char * type = mimetypes;
BOOL more = TRUE;
while(more) {
char * p = strchr(type, '|');
if(p)
*p = '\0';
else
more = FALSE;
if(0 == stricmp(mimetype, type)) {
// this is it!
delete [] verbuf;
FindClose(handle);
HINSTANCE hLib = LoadLibrary(szFileName);
return hLib;
}
type = p;
type++;
}
delete [] verbuf;
}
} while(FindNextFile(handle, &ffdataStruct));
FindClose(handle);
return NULL;
}
void UnloadRealPlugin(HINSTANCE hLib)
{
if(!hLib)
FreeLibrary(hLib);
}